[pox-dev] Send packet_out problem

[Murphy McCauley]

See "Working with Addresses" in the manual.  Ethernet addresses in POX are of class EthAddr, not strings.  You should compare against EthAddr("00:00:00:00:00:01").

Some other comments inline.

On Apr 10, 2014, at 11:07 PM, Chanthan Hel <hel.chanthan65 at gmail.com> wrote:

> Dear all,
> I want to send the packet out of the switch port and I write the code.
> 
> # Method for just sending a packet to any port (broadcast by default)
> def send_packet (event,dst_port):
>   msg = of.ofp_packet_out(in_port=event.ofp.in_port)
>   if event.ofp.buffer_id != -1 and event.ofp.buffer_id is not None:

It should never be -1.  Ever.  If it is ever -1, it's a bug.

>     # We got a buffer ID from the switch; use that
>     msg.buffer_id = event.ofp.buffer_id
>   else:
>     # No buffer ID from switch -- we got the raw data
>     if event.ofp.data:

This logic appears backwards.

>       # No raw_data specified -- nothing to send!
>       return
>     msg.data = event.ofp.data
>   msg.actions.append(of.ofp_action_output(port = dst_port))
>   event.connection.send(msg)

This above function is redundant.
po = of.ofp_packet_out(data = event.ofp) should do it.

> ## Create packet flow
> def _handle_PacketIn (event):
>   packet = event.parsed
>   if packet.src == "00:00:00:00:00:01":
>     send_packet(event, 2)
>   else:
>     send_packet(event, 3)
> 
> def launch ():
>   core.openflow.addListenerByName("PacketIn", _handle_PacketIn)
> 
> When packet arrive at switch although it have mac address "00:00:00:00:00:01" ,   it always go to the else condition
>  " else:
>     send_packet(event, 3)" 
> Please give me some suggestion
> Chanhan
> 
> -- 
> Mr. Chanthan Hel
> Electrical engineering, Faculty of Engineering,
> Chulalongkorn University (CU)
> 
> *Phone: +66 81 456 84 27*
>